C
H
A
N
G
100
A body of air is called this.
What is an air mass?
100
This air mass forms over land near the equator
Continental tropical air mass
100
A front is a _________ between two air masses.
Boundary
100
This front is represented by red circles.
A warm front
100
These two things determine what kind of air mass will form.
temperature and humidity
200
This air mass forms over water near the equator
Maritime tropical air mass
200
You are looking at a map and you see the symbol mP. What kind of air mass is present at that location.
Maritime polar
200
This front is represented by blue triangles on a weather map.
A cold front
200
This front forms when a cold air mass slides under a warm air mass and lifts it up to forms clouds.
A cold front
200
What weather instrument is used to measure atmospheric pressure?
Barometer
300
This air mass forms over land near the poles.
Continental polar air mass
300
You are looking at a map and you see the symbol cT. This air mass is present at that location.
Continental Tropical
300
This front forms when warm air slides over cold air.
A warm front
300
This front forms when a cold air mass meets a cold air mass with a warm air mass in the middle.
An occluded front
300
What directions do warm air masses tend to approach from?
S, SE, E
400
As air cools, it becomes more dense and sinks toward the Earth’s surface spinning clockwise.
High atmospheric pressure
400
As air warms, it becomes less dense and rises above the Earth’s surface spinning counterclockwise.
Low atmospheric pressure
400
This front is represented by purple triangles and circles all going the same direction.
Occluded front?
400
This air mass is represented by red circles and blue triangles. The circles and triangles are facing opposite directions.
A Stationary front
400
What directions do cold air masses tend to approach from?
N, NW, W
500
This air mass forms over water near the poles
Maritime polar
500
A line connecting points of equal atmospheric pressure
Isobar 
500
This front is when a cold air mass meets a warm air mass and neither one move.
A stationary front
500
High atmospheric pressure brings what kind of weather?
Sunny clear skies
500
Low atmospheric pressure brings what kind of weather?
Cloudy stormy skies